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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc=new Scanner(System.in);
  14. 		int n=sc.nextInt();
  15. 		int b[]=new int[n];
  16. 		for(int i=0;i<n;i++)
  17. 		b[i]=sc.nextInt();
  18.  
  19. 		int prefix[]=new int[n];
  20. 		prefix[0]=1;
  21. 		//longest increasing subarray
  22. 		for(int i=1;i<n;i++)
  23. 		{
  24. 			if(b[i]>b[i-1])
  25. 			prefix[i]=prefix[i-1]+1;
  26. 			else
  27. 			prefix[i]=1;
  28.  
  29. 		}
  30.  
  31.  
  32. 		int suffix[]=new int[n];
  33. 		suffix[n-1]=1;
  34. 		for(int i=n-2;i>=0;i--)
  35. 		{
  36. 			if(b[i]>b[i+1])
  37. 			suffix[i]=suffix[i+1]+1;
  38. 			else
  39. 			suffix[i]=1;
  40. 		}
  41.  
  42. 		int ans=0;
  43.  
  44. 		for(int i=0;i<n;i++)
  45. 		{
  46. 			ans+=( prefix[i]-1 )* (suffix[i]-1);
  47. 		}
  48. 		System.out.println(ans);
  49. 	}
  50. }
Success #stdin #stdout 0.14s 56504KB
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https://ideone.com/11Pnx6
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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